Loom for cross-weaving.



PATENTED APR. 25, 1905.

G. H. L. PBTTIB. v LOOM FOR CROSS WBAVING.

APPLIOATION FILED MAY 7, 1904.

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No. 788,328. PATBNTED APR. '25, 1905. G. H. L. PETTIB. LOOM FOR GROSSWEAVING.

APPLICATION FILED MAY 7, 1904.

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INVENTOR /m ff W-ITNESSES:

No. 788,328. PATBNTED APR. 25,1905.

G. H. L. PETTIE.

LOOM FOR CROSS WBAVING.

APPLICATION FILED MAY 7, 1904.

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WITNESSES: INVENTOR:

NTTED STATES Patented April 25, 1905.

PATENT OFFICE.

GEORGE H. L. PET'IIE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO`RICHARD H. AIMAN, OF PHILADELPHIA, PENNSYLVANIA.

LOOM FOR CROSS-WEAVING.

SPECIFICATION forming part of Letters Patent No. 788,328, dated April25, 1905.

Application filed May '7, 1904. Serial No. 206,809.

To (LZZ whom it may concern.-

Be it known that I, GEORGE H. L. Pn'r'rin, of Philadelphia, in thc Stateof Pennsylvania, have invented certain new and useful Improvements inLooms for Cross-Weaving, whereof the following is a specification,reference being had to the accompanying drawings.

My invention relates to what are known as doup-heddle mechanisms. It isusual to employ in such mechanisms heddle-shafts having central eyes forthe doup-threads and automatically-operati ve oscillatory tension-barswhich engage the doup-thread adjacent to the warp-beams, so as to yieldand prevent the detrimental strains upon the latter which wouldotherwise be caused during the shedding operation.

It is the object of my invention` to avoid such strains upon thedoup-threads and incidentally to dispense with the tension devicesaforesaid. To this end I provide a group of heddle-shafts, one of whichcomprises eyes for the doup-threads disposed a substantial distanceabove the normalcentral position of the usual eyes, so that when theother members of said group of heddle-shafts are disposed with theirceiitral eyes in horizontal alinement with the plane of the fabric thedoupthreads are upheld by said special shaft above the level of thefabric, and when the doupthreads are lowered they are slackened insteadof being strained, as in devices of the prior art.

My invention comprises the various novel features of construction andarrangement hereinafter more definitely specified and claimed.

In the accompanying drawings, Figure I is a perspective view showing aconvenient embodiment of my invention comprising five heddle-shafts.Fig. II is a vertical sectional view taken through the mechanism shownin Fig. I on a plane parallel with the warpthreads. Figs. III, IV, V,and VI are righthand end views of the group of shafts shown in Fig. Idisposed in respectively diiferent positions, indicating correspondingsteps in the shedding operation.

For clearness of illustration I have shown in Figs. I and II but asingle ordinary warpthread l and asingle doup-thread 2, although it isof course to be understood that any desired number of such threads maybe employed. The live shafts are numbered, re-

spectively, 4, 5, 6, 7, and 8, the first-named being adjacent to thelay. Said shafts 4, 5, and 6 are arranged to cooperate in twisting thedoup-thread 2, which extends through the eye 10 at the end of thedepending wire bight l1, which is carried by the cross-bar l2 in theshaft 5. Said bight 1l is engaged by the wires 14 and 15, which arerespectively carried by the shafts 4 and 6 and have the loops in theirupper and lower ends secured to the cross-bars 17 and 18 of said shafts.As best shown in Fig. I, the wires 14 and 15, respectively, local to theshafts 4 and 6, each comprise two strands, which are twisted together attheir central portions 19 and 20, so as to embrace the opposite sidestrands of the bght 11. As best shown in Fig. II, said wires 14 and 15are provided with offsets 22 and 23 immediately adjoining the eye l() ofsaid bight Il, so that the warp-thread l, which extends between saidwires 14 and 15, as indicated in Fig. I, is normally maintained belowsaid eye l0. It is to be understood that the arrangement above describedis suoli that in the relative reciprocation of said three shafts 4, 5,and 6 the warp-thread l is twisted alternately from one side to theother of the doupthread 2 as said wires 14 and l5 are alternately raisedto permit said thread l to rise above the doup-thread 2, held down bysaid eye 10. The doup-thread 2 passes to the eye 10 in the bight ll fromthe eye Q5 in the wire 26, which latter is supported by the cross-bars27 of the shaft 7 extending through its opposite end loops, said eye 25being eccentrically located between said loops. The warp-thread 1 passesbetween said wires 14 and l5 from the eye 29 in the wire 30, whichlatter is secured by its opposite end loops to the cross-bars 32 of theshaft 8. In the shedding operation said shafts 4, 5, 6, 7 and 8 assumethe several positions shown, respectively, in Figs. III to VI,inclusive, although not necessarily in that particular order, and it maybe noted that Fig. II corresponds with what may be termed the normalposition of said devices. (Shown in Figs. I and III.)

In Fig. IV the shafts 4, 5, and 7 are lowered and the shafts (SQ-and 8are raised, with the effect that the warp-thread l is twisted around thedoup-thread 2, being drawn up on the side of the eye 10, shown as therighthand side in Fig. II. In Fig. V the shafts 4 and 8 are raised andthe shafts 5, 6, and 7 are lowered, with the result that the warpthreadl is twisted upon the opposite side of the doup-thread 2 to thatcharacteristic of the position shown in Fig. IV,-viz: Itis drawn up onthe side of the eye l0, shown as the left-hand side in Fig. II. In theposition shown in Fig. VI all of the shafts 4, 5, 6, and 8 are raisedand the single shaft 7 lowered, with the effect that the doup-thread 2is slackened by the eye 25 in the shaft 7 being presented insubstantially the same relation below the eye lO in the shaft 5. It maybe here again noted that if said eye 25 were in the normal position orat the normal level-viz., at the center of the vertical height of theshaft 7 or arranged to coincide with the plane of the fabric when saidshaft is intermediate of its vertical movementwhen said shaft assumedthe relative position shown in Fig. VI said doup-thread 2 would bestrained and would require such relief as has hitherto been afforded byautomatic tension devices.

In order to insure the positive actuation of the shafts 5 and 7 in thedefinite relation above specified and shown in Figs. III to VI,inclusive, I provide the shaft 5 with end plates 35, which areconveniently secured thereon by screws 36. Said plates 35 are eachprovided with an end flange 37, which overlaps the shaft 4, an upperhorizontal flange 38, and a lower flange 39. Said plates 35 are alsoconveniently provided with depending guide members 40, which embrace thelugs 4l on the opposite ends of the shaft 7 and guide the shafts 6 and 8in parallel relation. However, said guides 4() may be omitted. Theshafts 4 and 6 are respectively provided upon their opposite ends withprojecting lugs 42 and 43, arranged to encounter said flanges 38 on theopposite end plates 35, so that said shafts 4 and 6 are positivelyuplifted when the shaft 5 is uplifted, as shown in Fig. VI. rIhe shaft 7is positively lowered by said plates 35 when the shaft 5 is lowered, asshown in Figs. IV and V, the lugs 4l on said shaft 7 being encounteredby said flanges 39 on the plates 35. The interengaging operation of saidplates 35 is advantageous in that it minimizes the number of shiftingdevices required for controlling the group of shafts-that is to say, itis only necessary to provide the shafts 4, 6, 7, and 8 with connections46, 47, 48, and 49, by which they may be positively drawn down, saidshafts 4, 6, and 8 being provided with connections 52, 53, and 54, bywhich they may be positively raised, and said shafts 5 and 7 beingsuspended upon springs 56 and 57. Although I find it convenient toemploy said plates 35, above described, for the reasons stated, it isobvious that they are not essential to the operation of the heddleshaft7, having its eyes 25 in abnormahposition, which is the characteristicfeature of my invention. Moreover, it is to be understood that I do notdesire to limit myself to the particular construction and arrangementdescribed, as it is obvious that various modifications may be madetherein without departing from the essential features of my invention.

I claim- 1. In a loom, the combination with heddle- Shafts respectivelyhaving eyes for the ordinary warp-threads and for the doup-threads; of aheddle-shaft having' eyes for the doupthreads located above the normallevel specified, and arranged to relax said threads at the lower limitof their shedding movement, substantially asset forth.

2. In aloom, the combination with a heddleshaft having' eyes fordoup-threads at the normal level, supported by wire bights; of twoshafts respectively arranged upon the opposite sides of said firstshaft, having offset wires engaged with the respectively oppositestrands of said bights; a fourth shaft having eyes for the doup-threadslocated above the normal level; and, a fifth shaft, arranged betweensaid fourth shaft and the warp-beam, having eyes for the ordinarywarp-threads at the normal level, substantially as set forth.

3. In a loom, the combination with heddleshafts respectively having eyesfor the ordinary warp-threads and for the doup-threads, at the normallevel specified; of a shaft having eyes for the doup-threads locatedabove the normal level, and arranged to relax said threads at the lowerlimit of their shedding movement, substantially as set forth.

4. In a loom, the combination with heddleshafts respectively having eyesfor the ordinary warp-threads and for the doup-threads, at the normallevel specified; of a shaft having eyes for the doup-threads locatedabove the normal level, and arranged to relax said threads at the lowerlimit of their shedding movement; end plates secured in stationaryposition upon one of said shafts; and, lugs projecting at the ends ofanother of said shafts arranged to encounter said plates; whereby, saidshafts may be shifted in definite relation, substantially as set forth.

5. In a loom, the combination with heddleshafts respectively having eyesfor the ordinary warp-threads and for the (loup-threads, at the normallevel specified; of a shaft having eyes for the doup-threads locatedabove IOO the normal level, and arranged to relaX said In testimonyWhereofIhavehereunto signed threads at the lower limit of their sheddingmy name, at Philadelphia, Pennsylvania, this movement; vertical end barsof metal on three 5th day of May, 1904. of said shafts, having lugsprojecting in the I 5 plane of said shafts; and, means carried byWitnesses:

another of said shafts to engage said lugs to ARTHUR E. PAIGE, shiftsaid shafts, substantially as set forth. HERBERT S. LANDELL.

GEORGE H. L. PETTIE.

